Live demo, Interactions in multiple linear regression
Break #6
What you have learned
Interactions in multiple linear regression
What’s coming next
Unbalanced data
FEV data
Descriptive Abstract: Sample of 654 youths, aged 3 to 19, in the area of East Boston during middle to late 1970’s. Interest concerns the relationship between smoking and FEV. Since the study is necessarily observational, statistical adjustment via regression models clarifies the relationship.
fev continuous measure (liters)
sex discrete/nominal (Female coded 0, Male coded 1)